Method of manufacturing eye-bars



(No Model.)

W. HAINSWORTH METHOD OFM ANUPAUTURING BARS. No. 298,748. Patented May20, 1884,.

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WVILLIAM HAINSWVORTH, OF PITTSBURG, PENNSYLVANIA.

METHOD OF MANUFACTURING EYE-BARS.

SPECIFICATION forming part of Letters Patent No. 298,748, dated May 20,1884.

Application filed December 3, 1883. (No model.)

To Ml whom, it may concern Beit known that I, WILLIAM HAINSWORTH, acitizen of the United States, residing at Pittsburg, county ofAllegheny, State of Pennsylvania, have invented or discovered a new anduseful Improvement in Methods of Manufacturing Eye-Bars; and I do herebydeclare the following to be a full, clear, concise, and exactdescription thereof, reference being had to the accompanying drawings,making a part of this specification, in which-like letters indicatinglike parts Figure 1 is'a perspective view of aplant used inmanufacturing eye-bars. Fig. 2 is a side elevation of a pair of rolls,the housing being shown in section. Fig. 3is a side view of a finishedeye-bar blank. Fig. at is a side view of bar wherein the notches areformed by setting down the edges.

My invention relates to a new and improved method of manufacturingeye-bars and other like articles which have enlarged ends and a reducedbody portion.

Heretofore such bars have been produced by rolling the bars to the sizein cross-section which the enlarged ends of the finished article is tohave. The reduction of the ends is stopped at this point, but the bodyportion is still further reduced on two of its sides by further rolling.In this rolling operation it is necessary that the rotation of the rollsshould be stopped instantaneously near each end of the bars, so as notto reduce the end portions. The rolls are then, while not in motion,forced nearer to each other and into that portion of the bar betweenthem. They are then started in a reverse direction, and when theopposite enlarged end is reached theyare again instantly stopped andagain adjusted toward each other. This method of forming eye-bars isobjectionable, as the sudden stopping and the forcible adjusting of therolls together subjects the rolling'mill to dangerous shocks andstrains; and it is obj ectionable for the further reason that the motionof the rolls is not always stopped at the proper point, and consequentlythe enlarged end will be reduced in size.

The object of my invention is to so manufacture these bars that the millwill not be subjected to sudden shocks and strains, as above stated, andthat there will be no danger of redu cin g the ends if the rotationofthe rolls should not be stopped when the enlarged ends are reached; and,in general terms, my invention consists in the method hereinafterdescribed and claimed.

Bythe ordinary forging or rolling operation I bring a bar to the size incross-section de sired for the enlarged ends. Near the ends of the bar Iform notches a and a in the edge thereof, either by setting down themetal bya steam-hammer, B, having suitable anvil and hammer-head, or bycutting out a piece of the metal on each edge. This setting'down or removal of the metal near the ends should be such as to reduce the bars atthese points to approximately the size in cross-section which the bodyportion of the finished bar is to have. The bar thus prepared is takento a pair of rolls, 0, providedwith aplain portion, 0, and a groove, 0,which has a width approximately equal to the thickness of the bar, andis placed edgewise into the groove 0, the notches a in its edges at oneend being in line with the bite of the rolls. The rolls having beenadjusted so as to produce the desired amount of reduction,are thenstarted in the proper direction to roll the body portion. As is usual,the bar will be drawn into the rolls and reduced and elongated until thenotches a at the opposite end of the bar are reached. At this point thefeed of the bar will stop, as the portion of the bar between the notchesa is smaller than the other portion just rolled, and consequently therolls will no longer bite the bar. The rolls are then stopped andadjusted for the next pass, and are then started in areversedirection,when the abovedescribed operation will be repeated. Thisrolling is continued until the portion of the bar between the notcheshas been reduced to the desired size in cross-section, which is the sameas that of the portion between the notches. It may happen that eitherthe setting down by the hammer or the action of the rolls may thickenthe bar somewhat. In that case the bar is taken from thehammer or frombetween the rolls, which are separated for that purpose, and then passedwith its flat side up between the plain portion 0 of the rolls, so as toreduce it to the proper thickness.

It will be understood that the rolls are to be provided with the usualreversing mechanism.

I have shown the journal-boxes of the upper roll supported by a weightedlever, d, and through the housing passes the screw 6, for depressingsaid roll; but I may employ any equivalent suitable device known in theart for effecting this adjustment.

I do not desire to be understood as limiting myself to working barsrectangular in crossseotion, as round bars may be worked'in the samemanner with equal facility by the use of setting-down dies properlyshaped.

' In so far as relates to the shape of the rolls, I do not desire toconfine myself to the shape shown, as the reducing of the body portionof the bar may be effected in any suitably-shaped rolls.

What I claim as my invention ismediate between but away from the ends iso reduced by successive passes back and forth I between rolls, the rollsbeing reversed while WILLIAM HAINSVORTH.

WVitnesses:

DARWIN S. WOLOOTT, R. H.WHITILESEY.

